- a fine-grained igneous rock rich in silica: the volcanic equivalent of granite.
Origin of rhyolite
1865–70; rhyo- (irregular < Greek rhýax stream of lava) + -lite
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Examples from the Web for rhyolitic
Then came the period of rhyolitic flows, the centers of volcanic activity being as before Mts.The Yellowstone National Park
Hiram Martin Chittenden
- a fine-grained igneous rock consisting of quartz, feldspars, and mica or amphibole. It is the volcanic equivalent of granite
C19: rhyo- from Greek rhuax a stream of lava + lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A usually light-colored, fine-grained extrusive igneous rock that is compositionally similar to granite. It often includes flow lines formed during the extrusion.
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